77 lines
2.2 KiB
C
77 lines
2.2 KiB
C
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/*
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Copyright (C) 2010 bg <bg_one@mail.ru>
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*/
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#ifndef CHAN_DONGLE_MIXBUFFER_H_INCLUDED
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#define CHAN_DONGLE_MIXBUFFER_H_INCLUDED
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#include "ast_config.h"
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#include <asterisk/linkedlists.h> /* AST_LIST_ENTRY() AST_LIST_HEAD_NOLOCK() */
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#include "ringbuffer.h"
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struct mixstream {
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AST_LIST_ENTRY(mixstream) entry;
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size_t used; /*!< number of bytes used */
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size_t write; /*!< write position */
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};
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struct mixbuffer {
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AST_LIST_HEAD_NOLOCK(,mixstream) streams; /*!< list of stream descriptions */
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struct ringbuffer rb; /*!< base */
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unsigned attached; /*!< number of attached streams */
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};
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/* initialize mixbuffer */
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INLINE_DECL void mixb_init(struct mixbuffer * mb, void * buf, size_t len)
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{
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AST_LIST_HEAD_INIT_NOLOCK(&mb->streams);
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rb_init(&mb->rb, buf, len);
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mb->attached = 0;
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}
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/* attach stream to mix buffer */
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EXPORT_DECL void mixb_attach(struct mixbuffer * mb, struct mixstream * stream);
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/* detach stream from mix buffer */
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EXPORT_DECL void mixb_detach(struct mixbuffer * mb, struct mixstream * stream);
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/* get amount of free bytes in buffer for specified stream */
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INLINE_DECL size_t mixb_free (const struct mixbuffer * mb, const struct mixstream * stream)
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{
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return mb->rb.size - stream->used;
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}
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/* get bytes used i.e. now may bytes can read */
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INLINE_DECL size_t mixb_used(const struct mixbuffer * mb)
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{
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return rb_used(&mb->rb);
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}
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/* advice read position */
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EXPORT_DECL size_t mixb_read_upd(struct mixbuffer * mb, size_t len);
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/* add data to mix buffer for specified stream */
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EXPORT_DECL size_t mixb_write(struct mixbuffer * mb, struct mixstream * stream, const char * data, size_t len);
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/* get data pointer and sizes in iov for all available for reading data in buffer */
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INLINE_DECL int mixb_read_all_iov (const struct mixbuffer * mb, struct iovec iov[2])
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{
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return rb_read_all_iov(&mb->rb, iov);
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}
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/* get data pointer and sizes in iov only for first len bytes */
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INLINE_DECL int mixb_read_n_iov (const struct mixbuffer * mb, struct iovec iov[2], size_t len)
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{
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return rb_read_n_iov(&mb->rb, iov, len);
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}
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/* get number of attached streams */
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INLINE_DECL int mixb_streams (const struct mixbuffer * mb)
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{
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return mb->attached;
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}
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#endif /* CHAN_DONGLE_MIXBUFFER_H_INCLUDED */
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